化工新型材料

化工新型材料 ›› 2025, Vol. 53 ›› Issue (1) : 184-188. DOI: 10.19817/j.cnki.issn1006-3536.2025.01.042

科学研究

阴离子对电化学剥离制备氧化石墨烯的影响

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作者信息 +

Effect of anions on the preparation of graphene oxide by electrochemical exfoliation

Zhang Yuying¹, Yang Xiaofeng¹, Wang Gao², Zhu Pengqiang¹, Zhao Yanru¹, Wu Rui¹

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Received		Published
2024-07-30		2025-01-20
Issue Date	Revised Date
2025-01-17	2024-07-30

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摘要

以不同阴离子酸作为氧化步骤电解液,采用电化学剥离法制备氧化石墨烯。结果表明:SO^2-₄、NO^-₃和PO^3-₄这3种阴离子存在下均可制得氧化石墨烯。相同工艺条件下,当以硫酸为电解液时,SO^2-₄可通过促进生成 ·OH和降低石墨插层化合物表面张力生成氧化程度较高的氧化石墨烯。氧化石墨烯的氧化程度与其电容性能、循环稳定性和阻抗均呈正相关。硫酸作为电解液时制得的氧化石墨烯,在0.5A/g电流密度下比电容为30.5F/g,循环500圈后循环保持率为83%。

Abstract

Different anionic acids were employed as the electrolyte in the oxidation process to produce graphene oxide by electrochemical exfoliation method.The results indicated that graphene oxide could be successfully obtained in the presence of SO^2-₄,NO^-₃ and PO^3-₄ ions.When sulfuric acid was used as the electrolyte,SO^2-₄ promoted the generation of ·OH radicals and reduced the surface tension of graphite intercalation compounds,resulting in the formation of graphene oxide with higher oxidation degree under identical process conditions.Furthermore,the oxidation degree of graphene oxide was positively correlated with its capacitance performance,cycle stability,and impedance.Specifically,the graphene oxide prepared with sulfuric acid as the electrolyte exhibited a specific capacitance of 30.5F/g at a current density of 0.5A/g and maintained 83% of its initial capacitance after 500 cycles.

关键词

阴离子 / 氧化石墨烯 / 氧化程度 / 电性能

Key words

anion / graphene oxide / oxidation degree / electrical properties

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阴离子对电化学剥离制备氧化石墨烯的影响[J]. 化工新型材料, 2025, 53(1): 184-188 DOI:10.19817/j.cnki.issn1006-3536.2025.01.042

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